Impact of the thermal pair fluctuations is measured by the Ginzburg number \(Gi\)  (also the Ginzburg-Levanyuk parameter). We recall that \(Gi=1-T_{Gi}/T_{c0}\) , where \(T_{Gi}\)  is the temperature at which the mean-field heat capacity is equal to the fluctuation-driven heat capacity [1]} and at \(T > T_{Gi}\)  the fluctuations contribution predominates. The Ginzburg number for the free energy functional (REF ) is expressed as [1]}, [3]}
\(Gi=\frac{1}{32\pi ^2}\frac{T_{c0}b_\psi ^2}{a^\prime _\psi {\cal K}^{(x)}_\psi {\cal K}^{(y)}_\psi {\cal K}^{(z)}_\psi }.\) 
